When stopped, the velocity of the van is 0 m/s.
We can use the formula <em> = +</em> <em>at</em>, where <em>a </em>is acceleration.
0 m/s = 11.5 m/s + (3.5 s)<em>a</em>
<em>-</em>11.5 = 3.5a
<em>a ≈ </em>-3.28571429 m/s^2
Round it however you need.
The action is the child sticking his/her hand out of the window of the moving car.
The reaction is getting yelled at by his/her parents as soon as they notice it.
Answer:
eight
Explanation:
it's atomic number is 8 which mean that an oxygen atom has eight protons in it's nucleus